CN204347826U - A kind of ground proximity warning computer with modularization self-checking function - Google Patents
A kind of ground proximity warning computer with modularization self-checking function Download PDFInfo
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- CN204347826U CN204347826U CN201420734117.8U CN201420734117U CN204347826U CN 204347826 U CN204347826 U CN 204347826U CN 201420734117 U CN201420734117 U CN 201420734117U CN 204347826 U CN204347826 U CN 204347826U
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Abstract
The utility model discloses a kind of ground proximity warning computer with modularization self-checking function, it is characterized in that, communication self-inspection channel switching module is set between alarm compunication receiving cable and PERCOM peripheral communication sendaisle; Between the differential interface and external voice output channel of the output of alarm computer audio, sound signal handover module is set; At computing machine discrete magnitude external channel setting discrete magnitude self-test signal handover module.The utility model devises corresponding signal switching circuit for the feature of each selftest module and effectively blocks the negative effect produced between circuit module.The utility model has the advantage of can improve product reliability, security, testability and maintainability; Be conducive to the degree of modularity improving product design; Be conducive to the troubleshooting and the maintenance efficiency that improve product.
Description
Technical field
The utility model relates to aircraft ground proximity warning computer, has the ground proximity warning computer of modularization self-checking function.
Background technology
The existing self-checking of alarm computing machine just simply detects the various discrete magnitudes of system, project and content limitation's property of detection are large, detection method, means are more single, cannot system be carried out to alarm computing machine and comprehensively detect, the duty of computing machine modules can not be reflected.
Utility model content
The purpose of this utility model is to provide a kind of ground proximity warning computer with modularization self-checking function, can carry out the Function detection of modules in computing machine and the detection of module work state.
To achieve these goals, the technical solution of the utility model is: a kind of ground proximity warning computer with modularization self-checking function, is characterized in that:
Communication self-inspection channel switching module is set between alarm compunication receiving cable and PERCOM peripheral communication sendaisle, described communication self-inspection channel switching module is connected with alarm compunication receiving cable, PERCOM peripheral communication sendaisle and alarm computer testing sendaisle, communication self-inspection channel switching module control end is connected with CPLD, during proper communication, communication self-inspection channel switching module control end is set to low level, alarm compunication receiving cable is connected with PERCOM peripheral communication sendaisle, realizes communicating between alarm computing machine with airborne electric equipment; During communication module self-inspection, communication self-inspection channel switching module is set to high level, is connected by alarm compunication receiving cable, realizes the self-inspection of communications reception, sendaisle with alarm computer testing sendaisle;
Between the differential interface and external voice output channel of the output of alarm computer audio, sound signal handover module is set, the differential interface that described sound signal handover module exports with alarm computer audio, external voice output channel and alarm computer audio detect interface and are connected, described sound signal handover module control end is connected with CPLD, when normal voice exports, sound signal handover module control end is set to low level, the differential interface that alarm computer audio exports is connected with external voice output channel, realizes normal alarm voice output; During audio-frequency module self-inspection, alarm computing machine is by audio-frequency module sine wave output, and Audio conversion module control end is set to high level, the differential interface that alarm computer audio exports is detected interface with alarm computer audio and is connected;
At computing machine discrete magnitude external channel setting discrete magnitude self-test signal handover module, described discrete magnitude self-test signal handover module is connected with the external passage of discrete magnitude, free end and high level or low level end, described discrete magnitude self-test signal handover module control end is connected with CPLD, during normal work, discrete magnitude self-test signal handover module control end is set to low level, the external passage of discrete magnitude is unsettled, makes normal acquisition and the output of discrete magnitude; During the self-inspection of discrete magnitude module, discrete magnitude self-test signal handover module control end is set to high level, forces the discrete magnitude of external for discrete magnitude passage to be set to known state.Described known state is high level or the low level state of setting.
Described ground proximity warning computer also comprises memory module self-test unit, for carrying out self-inspection to internal memory, program storage and data-carrier store.
The utility model achieves the Function detection of modules in computing machine and the detection of module work state, and in addition, the feature for each selftest module devises corresponding signal switching circuit and effectively blocks the negative effect produced between circuit module.The utility model has the advantage of can improve product reliability, security, testability and maintainability; Be conducive to the degree of modularity improving product design; Be conducive to the troubleshooting and the maintenance efficiency that improve product.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of communication self-inspection channel switching module.
Fig. 2 is the circuit diagram of sound signal handover module.
Fig. 3 is the circuit diagram of discrete magnitude self-test signal handover module.
Embodiment
429 and 422 communications are one of topmost communication modes between airborne electric equipment.Data a large amount of between alarm computing machine with other airborne electric equipments are transmitted to communicate with 422 by 429 and are realized.429 and 422 communication modules are directly connected to the correctness of sending and receiving data, are the bases that alarm computing machine can normally work, and it is necessary for therefore carrying out modularization detection to 429 and 422 modules.Because the mechanism of 422 module self-inspections is consistent with 429, only 429 current module self-inspections are illustrated herein.
The alarm computing machine that the utility model relates to provides 4 circuit-switched data sendaisles and 8 circuit-switched data receiving cables.In order to meet the requirement of 12 tunnel 429 passage self-inspections, self-checking circuit uses 4 high pressure anti-latch-type four-way single-pole double-throw switch (SPDT) ADG5234, communicates realizing not affecting alarm computing machine while passage and signal freely but change with airborne electric equipment normal 429.Be illustrated in figure 1 429 module self-inspection channel switching module 2.
During normal 429 communication, control end signal " IN_429_A " is set to low level, 429 receiving cables " AR429RXDCH1+ ", " AR429RXDCH1-" are connected with outside 429 sendaisles " W_AR429RXDCH1+ ", " W_AR429RXDCH1-" respectively, realize between alarm computing machine with airborne electric equipment 429 and communicate.
During 429 module self-inspection, control end signal " IN_429_A " is set to high level, 429 receiving cables " AR429RXDCH1+ ", " AR429RXDCH1-" are connected with sendaisle " AR429TXD1+ ", " AR429TXD1-" respectively, realize the self-inspection of 429 receptions, sendaisle." AR429TXD1+ ", " AR429TXD1-" are the sendaisles that computing machine itself sends test signal.
Dio Output Modules self-inspection
Audio-frequency module finally with the form outputting alarm computing machine of alarm voice in conjunction with data, the isoparametric result of calculation of landform, have very important directive function to the manipulation that pilot is real-time.Ensure that the security of the normal output of alarm voice to flight is of great importance.
As shown in Figure 2, sound signal handover module 3 uses a slice ADG5234 to realize the switching of sound signal.
When normal voice exports, control end " AUDIO_TEST_CTRL " is set to low level, the differential interface " A_SPK_OUT+ " exported by audio frequency, " A_SPK_OUT-" link with " ISL_SPK_OUT+ ", " ISL_SPK_OUT-" respectively, realize normal alarm voice output.
During audio-frequency module self-inspection, system is the sine wave of 1000Hz by audio-frequency module output frequency.Control end " AUDIO_TEST_CTRL " is set to high level, and the differential interface " A_SPK_OUT+ " exported by audio frequency, " A_SPK_OUT-" link with audio detection interface " TEST_SPK_OUT+ ", " TEST_SPK_OUT-" respectively.Signal conversion is carried out by AD620 in rear end, and output frequency is the sine wave of 1000Hz.Sine wave converts by voltage comparator the square wave that frequency is 1000Hz to.System gathers square-wave signal, detects the duty of audio-frequency module.
Figure 3 shows that the schematic diagram of discrete magnitude self-test signal handover module 4.
The collection of discrete magnitude and output are also that alarm Computer signal gathers and the important form exported.A lot of status informations of body are all undertaken gathering and exporting by discrete magnitude.As shown in Figure 3, discrete magnitude self-test signal handover module adopts relay GJRW-12M-005D-4.
During normal work, control signal " STST " is set to low level, by relay by unsettled to " ST_DIS_IN_28V " and " ST_DIS_IN_GND ", makes the normal acquisition of discrete magnitude and exports the impact of not receiving testing circuit." ST_DIS_IN_28V " and " ST_DIS_IN_GND " is the external passage of discrete magnitude signal.
During the self-inspection of discrete magnitude module, control signal " STST " is set to high level, by relay by " ST_DIS_IN_28V ", " ST_DIS_IN_GND " respectively with " F_28V ", " F_GND " short circuit, the discrete magnitude of specifying is forced to be set to known state (F_28V or F_GND), the state of alarm computer acquisition discrete magnitude also contrasts with known state, realizes the self-inspection of discrete magnitude module.
Memory module self-inspection
The memory module of alarm computing machine comprises internal memory (SDRAM), program storage (NOR Flash), data-carrier store (NOR Flash).System-program code stores in program memory, and after powering on, program code is read and write in internal memory and run by system, and in program operation process, system is written to needing the data of record in data-carrier store.Memory module self-inspection can guarantee the correctness of system program and data record.
Internal memory detects: with the memory block of fixed size for unit, the first address of internal storage location is write the data of set form, and by data readback, and whether correct, carry out internal memory detection if comparing data.
Program storage detects: in units of block, read the data segment of each piece of regular length from start address, repeats to read N time, and whether compare the data read for N time consistent.
Data-carrier store detects: with Kuai Wei unit, the first address of block not writing data writes the data segment of set form, then back read data contrasting, and finally wipes whole piece, completes testing process.In order to the data protected, the block also not writing data is selected to detect.First address is the first address of this block.Data-carrier store forms by some pieces, and every block has corresponding start address.The reading and writing of storer are carried out in units of byte, and erasing is carried out in units of block.
The control signal of described commutation circuit is connected with CPLD, the switching of the logic realization monitoring channel of CPU control CPLD.
Claims (2)
1. there is a ground proximity warning computer for modularization self-checking function, it is characterized in that, communication self-inspection channel switching module is set between alarm compunication receiving cable and PERCOM peripheral communication sendaisle; Between the differential interface and external voice output channel of the output of alarm computer audio, sound signal handover module is set; At computing machine discrete magnitude external channel setting discrete magnitude self-test signal handover module.
2. ground proximity warning computer as claimed in claim 1, it is characterized in that communication self-inspection channel switching module adopts high pressure anti-latch-type four-way single-pole double-throw switch (SPDT) ADG5234, sound signal handover module adopts high pressure anti-latch-type four-way single-pole double-throw switch (SPDT) ADG5234, and discrete magnitude self-test signal handover module adopts relay GJRW-12M-005D-4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420734117.8U CN204347826U (en) | 2014-11-28 | 2014-11-28 | A kind of ground proximity warning computer with modularization self-checking function |
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| CN201420734117.8U CN204347826U (en) | 2014-11-28 | 2014-11-28 | A kind of ground proximity warning computer with modularization self-checking function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143959A (en) * | 2018-09-11 | 2019-01-04 | 陕西千山航空电子有限责任公司 | A kind of highly reliable anti-interference discrete magnitude output control circuit |
| CN110542848A (en) * | 2019-09-20 | 2019-12-06 | 天津津航计算技术研究所 | Discrete magnitude acquisition power-on BIT self-detection circuit based on micro relay |
| CN113885392A (en) * | 2021-10-18 | 2022-01-04 | 卡斯柯信号有限公司 | Fuse-free discrete output safety state escape protection system for safety output |
-
2014
- 2014-11-28 CN CN201420734117.8U patent/CN204347826U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143959A (en) * | 2018-09-11 | 2019-01-04 | 陕西千山航空电子有限责任公司 | A kind of highly reliable anti-interference discrete magnitude output control circuit |
| CN110542848A (en) * | 2019-09-20 | 2019-12-06 | 天津津航计算技术研究所 | Discrete magnitude acquisition power-on BIT self-detection circuit based on micro relay |
| CN110542848B (en) * | 2019-09-20 | 2021-07-20 | 天津津航计算技术研究所 | Discrete magnitude acquisition power-on BIT self-detection circuit based on micro relay |
| CN113885392A (en) * | 2021-10-18 | 2022-01-04 | 卡斯柯信号有限公司 | Fuse-free discrete output safety state escape protection system for safety output |
| CN113885392B (en) * | 2021-10-18 | 2024-04-26 | 卡斯柯信号有限公司 | Fuse-free discrete output safety state escape protection system for safety output |
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